In today's "What to Watch on Wall Street" segment for Friday, Sept. 19th 2014, we report on Alibaba as the highly-anticipated, and possibly the world’s largest stock offering, makes its market debut. The Chinese e-commerce giant will hit trade on the New York Stock Exchange starting Friday. In Scotland, the results from the independence vote are expected out around 1 a.m. eastern time. Voters began casting their ballots on Thursday in a historic referendum on whether to be an independent country or stay in the U.K. On the U.S. economic calendar, the Conference Board Leading Economic Index for August will be released. For the latest financial news and updates from Wall Street, check back here on TheStreet.com throughout the day.